Hot-air generator for fire-places



(No Model.) J S DEARDORFP 2 sheets-sheen 1.

HOT AIR GENERATOR FOR FIRE PLACES. N0. 313,998.

Patented Mar. 17, 1885..

N. PETERS. Pham Lhubmmer (NoModel.) l S DEARDGRFF 2 Sheets-Sheet 2. yHOTAIR GENERATOR F08 PIRE PLACES. l No. 313,998. Patented Man 17, 1885.

IH H---- --iv i 8 l 2 d Q F11 Rx "10mg UNTTEE STATES PATENT OFFICE,

JESSE s. DEA'EDOEE'E, OE CANAL DOvEE, OHIO.

HOT-AIR GENERATOR FOR FlRE-PLACES.

SEGFICATEQK forming part of Letters EPatent'No. 313,998, dated March 17,1885.

Application hd June lv/I, 15%

To all whom, it may concern,.-

Be it known that L JESSE S. DEAEDOREE, a citizen of the United States,residing at Canal Dover, in the county of Tuscarawas and State of Ohio,have invented a new and useful Hot- `Air Generator for Fire-Places, ofwhich the plify and cheapen the construction ofthe apparatus and makethe same more eiicient in use.

With these and other objects in view the said invention consists incertain details of construction and combination ofparts, as hereinafterset forth, and particularly pointed out in the claims.

In the accompanying drawings, Figure l is a front View of a lire-placepartly broken away, illustrating the application ot' my in1- provement.Fig. 2 is a vertical longitudinal sectional view of the same on line xw, Fig. 1. Fig. 3 is a detail perspective View of the chamber with thefront plate removed. Fig. 4 is a vertical transverse section.

Referring to the drawings, A designates the chamber, which may be madeof wrought or cast iron, or terra-cotta or other suitable material, butpreferably of east-iron, said cham4 ber comprising a bottom wall, B,sides@ C, top wall, D, and back wall, E, and made in one or twosections, as may be found desirable. At or about two-thirds of theirlength from the bottom wall the sides C C slant outward at an angle ofabout forty-five degrees, the top wall, D, inclining downward from theback wall and connecting with the sides, as shown.

F designates the removably-attached front plate formed in one piece andcorrugated, as shown, the upper portion of the front plate inclining atan angle to the lower portion to correspond with the Shape ofthe chamberA, the edges of the plate along the top and sides being formed with aninwardly-turned flange, G, overlapping the top and side edges of thechamber A, thus shielding the chamber from the introduction of gas,bolts H H passing through the flanges and serving to secure theA front(No uio Eel.)

'lhe sides (l C are provided with inletsllnear the bottom wall, B, `forthe entrance of cold air to the chamber, and should it be found de`sirable under certain circumstances a cold-air inlet may be formed inthe back wall. wall, D, is formed with a series of swells, M, extendingout from the top wall, a series of openings, J, being formed through theswells near the back wall at the highest part of the chamber, and aseries of pipes, K, extending from the openings upward through thechimney for conducting the heated air from the chamber to the severalapartments ofthe building, the upper ends of the pipes or flues openinginto registers ofsuitable form. Sockl ets L L are formed around theopenings for the purpose of keeping the pipes or tlues K ina verticalposition.

The operation ofmy invention will be readily understood from theforgoing description, taken in connection with the annexed drawings.rlhe chamber rests at its bottom on masonry-work M of the chimney, andis built away from the back wall of the chimney, so as to leave a spacebetween the same for the passage of soot and ashes, and thus the backwall ofthe chimney will not conduct heat away from the chamber. Thepeculiar shape of the front plate is productive of the most thoroughacvtion of the heat from the grate, inasmuch as the fuel rests againstthe lower portion ofthe plate, while the upper portion projecting outover the fire receives the volume of the ascending currentsof heated airand gases, so that the charnber isiheated to the utmost degree. The coldair entering from the lower portion of the chamber soon becomes heatedand rises toward the highest part of the chamber, where the outlet-linesare located,the hot air passing through the iiues and up into the roomsabove, to which the pipes or ilues communicate, the registers beingemployed to shutoff thesupplythrough any one pipe, as found desirable.

It will be' seen that by constructing the front plate in one piece it isless liable to warp, and will also prevent leakage of gas or hot air,which would happen if it were made of two pieces, the meetingjoint ofwhich may open by the constant contraction and expansion of the heatfrom the lire. It will also be seen that the flange around the sides andtop edges of Thetop' the front plate will overlap the joint made by thefront plate with the chamber, thereby preventing the introduction ofgases into or the Wasting of hot air from the chamber. The inclined formof the top wall enables the hot air to rise directly to the point Wherethe hotair pipes connect, and thus the introduction of cold air and theoutward passage of hot air is kept up continuously. Furthermore, bymeans of this construction I am enabled to adjust and use one form ofchamber for all the different sizes of mantels and grates, since theslanting form of the top wall with its swell on the back enables me toapply it in various places where a straight top wall could not be used.It will be seen that the front plate may be easily de` tached andreplaced by a new one when it becomes useless. The castings of thechamberare not exposed to the action of the fire, except the frontremovable plate, as they are all incased by the masonry-work- In orderthat those skilled in the art to which this invention appertains mayhave a full and clear idea of the nature and advantages of the presentinvention, I would haveit understood thatI do not claim any of thefeatures shown in my former patent.

rlhe additional invention herein set forth is an essential improvementfor the practical inof the present improvement,I would state that priorto my invention it has been proposed to n se hot-ai r generators removedfrom the wall to afford a space behind; but in my caseIprovide thegenerator with swells,which prevent it from setting against the wall andclosing the space; also, that it has been proposed to use a corrugatedfront plate with its edges flanged to lap over the top and side walls ofthe generator to make a tight joint.

Having described my invention, I claim-- l. As an improvement in hot-airgenerators, the combination, with the chamber havingits top wallslanting downward from the back wall and its upper portion projectingoutward,and a series of swells orextensions on the rear ofthe top wallto rest against the back wall of the chimney so as to set the chamberout from the same, of the removable frontplate conforming to the shapeof the chamber and flanged to t over the top' and side edges thereof,cold-air inlets provided in the chamber, and openings through the topwall adjacent to the swells to receive a corresponding number of pipesor flues, arranged and operating as set forth.

2. ln a hot-air generator, the combination,

with the chamber having its top wall slanting downward, swells orextensions M,on the rear end of said wall, holes through the top walladjacent to the extensions, andaseries of pipes or dues fitted in theholes and extending upward through the chimney and communicat ing withthe rooms above, of the removable front plate, arranged and operatingsubstantially as described.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in presence of two witnesses.

JESSE S. DEARDORFF.

Titnesses:

GEORGE XV. SCHILLING, Josnrn H. Hoscrnrrnn.

